Microsoft: Running Citrix Webinterface 5.1 on Windows 2003 64-bit


After installing Citrix Webinterface 5.1 on my Windows 2003 R2 SP2 64-bit VM i get the following error:

ISAPI Filter ‘C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\aspnet_filter.dll’ could not be loaded due to a configuration problem. The current configuration only supports loading images built for a AMD64 processor architecture. The data field contains the error number. To learn more about this issue, including how to troubleshooting this kind of processor architecture mismatch error, see

To resolve this error you must prepare your IIS and ASP.NET 2.0 to an 64-bit application.

ASP.NET 2.0, 64-bit version


To run the 64-bit version of ASP.NET 2.0, follow these steps:

  1. Click Start, click Run, type cmd, and then click OK.
  2. Type the following command to disable the 32-bit mode:

    cscript %SYSTEMDRIVE%\inetpub\adminscripts\adsutil.vbs SET W3SVC/AppPools/Enable32bitAppOnWin64 0

  3. Type the following command to install the version of ASP.NET 2.0 and to install the script maps at the IIS root and under:

    %SYSTEMROOT%\Microsoft.NET\Framework64\v2.0.50727\aspnet_regiis.exe -i

  4. Make sure that the status of ASP.NET version 2.0.50727 is set to Allowed in the Web service extension list in Internet Information Services Manager

Enable32bitAppOnWin64           : (BOOLEAN) False

Finished installing ASP.NET (2.0.50727).


And my Citrix Webinterface is working:


Source: Microsoft

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